Fix the query for discovery with current user

See https://github.com/strongloop/loopback-connector-mysql/issues/22

lib/discovery.js

@@ -35,7 +35,7 @@ function mixinDiscovery(MySQL) {
         + ' FROM information_schema.tables WHERE table_schema=\'' + owner + '\'', 'table_schema, table_name', options);
     } else {
       sqlTables = paginateSQL('SELECT \'table\' AS "type", table_name AS "name",'
-        + ' table_schema AS "owner" FROM information_schema.tables',
+        + ' table_schema AS "owner" FROM information_schema.tables WHERE table_schema=SUBSTRING_INDEX(USER(),\'@\',1)',
         'table_name', options);
     }
     return sqlTables;

test/mysql.discover.test.js

@@ -3,10 +3,10 @@ require('should');
 
 var assert = require('assert');
 var DataSource = require('loopback-datasource-juggler').DataSource;
-var db;
+var db, config;
 
 before(function () {
-  var config = require('rc')('loopback', {dev: {mysql: {}}}).dev.mysql;
+  config = require('rc')('loopback', {dev: {mysql: {}}}).dev.mysql;
   config.database = 'STRONGLOOP';
   db = new DataSource(require('../'), config);
 });
@@ -37,6 +37,26 @@ describe('discoverModels', function () {
     });
   });
 
+  describe('Discover current user\'s tables', function () {
+    it('should return an array of tables for the current user', function (done) {
+
+      db.discoverModelDefinitions({
+        limit: 3
+      }, function (err, models) {
+        if (err) {
+          console.error(err);
+          done(err);
+        } else {
+          var views = false;
+          models.forEach(function (m) {
+            assert.equal(m.owner, config.username);
+          });
+          done(null, models);
+        }
+      });
+    });
+  });
+
   describe('Discover models excluding views', function () {
     it('should return an array of only tables', function (done) {